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While naming ionic compounds using IUPAC involving multivalent metal ions the oxidation state or valency of the element is shown in brackets after the name of the metal using roman numerals. Example Iron (II) Sulfate = Fe2SO4, if you name the same compound using trivial naming system or the older naming system the compound is called Ferrous Sulfate.
Multivalent ions when named using the trivial system the metal with lower oxidation system always ends in -ous and the next higher oxidation number will end in -ic.
So Iron (III) Sulfate or Fe2(SO4)3 will be called Ferric Sulfate.
Cu+ = Cuprous ion
Cu2+ = Cupric ion and so on

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This is a simple how to on creating your document using pages on iPad or iPhone and syncing them with your iTunes for use in your computer or for editing the document on the computer. This information is useful for those on the move most of the time and when you want to get your documents organized this is an easy method instead of emailing the documents to yourself. This article is linked to the page here.How to sync pages with iTunes